docs: fix missing %n in --printf examples

See revision be9364a187fe4982fd4bf2df1654f83db8ebeee1

+  man pages cosmetics
ziddu: fix, upstream changed
1fichier (download): Yet another 'file deleted' message
oboom + uploadable_ch: new modules

Requested by rodrigo.pnq
oboom: typo
ziddu: no delete function
core.sh: add 'R' type for argument parsing

R: check for disk size (positive intefer with mandatory mega or giga suffix).

For example:
256M (mega is 10^6)
256Mi (mebi is 2^20, alias: m)
2G (giga is 10^9)
2Gi (gibi is 2^30)
0 is not allowed
128 is not allowed (missing suffix)
plowdown: add --min-space command-line option

It can be sometimes useful to monitor available disk space.
Documentation updated.
uploadhero (download): fix download

Take attention to TLD.
Fixes issue 1085.
Makefile: missing plowprobe symlink uninstall
zippyshare (download): fix, upstream changed

Thanks to gaffa for original patch
INSTALL: add dependency section (moved from README)

Better presentation.
bash completion: fix missing --min-space

Was partially done in revision fa90db2b079d2e9ae5a6f16b91cd8e59f9a9c080
filepost: Remove pipes to avoid error 141 (SIGPIPE)

Fixes issue 1100
filepost (download): fix quoting

Regression introduced in 67094d018ad94453721623b140b6c96184b00479
hdstream_to: new module